I've found that going over speed bumps is a lot better than going over speed dips. There is one parking lot near me that uses the dips and I think it causes a lot of strain as the enitre weight of the car comes down on the suspension as opposed to the tires being pushed up into the chassis.
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (194,000)
1999 E300 Turbodiesel (244,000 miles, dies at 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles)
2011 Audi A4 Avant (129,000 miles) hate this car!
BMW 330 xi 6 speed manual (100,034 miles)